module type Printable = {
  type t
  let print: (Format.formatter, t) => unit
}

module type Comparable = {
  type t
  let compare: (t, t) => int
}

module type Foo = {}

module type Foo = {/* rainy clouds */}

module type Foo = {
  /* rainy clouds */
}

module type Foo = { // trailing
}

module type Foo = {
  // Sunny clouds
}
